Intel Core i5 6600K 's Advantages
Newer PCIe version (3.0 vs 2.0)
Higher base frequency (3.5GHz vs 2.0GHz)
Intel Celeron J4005 's Advantages
Released 2 years and 4 months late
Higher specification of memory (2400 vs 2133)
Larger memory bandwidth (35.76GB/s vs 34.1GB/s)
Lower TDP (10W vs 91W)